16720855

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{67}}^1\times {\mathrm{71}}^1$

素因数の和:199

約数の個数: 32

約数和(自身を含む): 22325760

約数和(自身を除く): 5604905

約数列:

[1, 5, 19, 37, 67, 71, 95, 185, 335, 355, 703, 1273, 1349, 2479, 2627, 3515, 4757, 6365, 6745, 12395, 13135, 23785, 47101, 49913, 90383, 176009, 235505, 249565, 451915, 880045, 3344171, 16720855]

約数ペア:

[(1, 16720855), (5, 3344171), (19, 880045), (37, 451915), (67, 249565), (71, 235505), (95, 176009), (185, 90383), (335, 49913), (355, 47101), (703, 23785), (1273, 13135), (1349, 12395), (2479, 6745), (2627, 6365), (3515, 4757)]